Table 1.

Regression results for prediction of annual percent change in breastfeeding, 1973–2000

Explanatory variable	B	SEB
Number of hand feeding ads (prior year)	-.20*	.07
Number of hand feeding articles (prior year)	.35	.71
Number of breastfeeding articles (prior year)	.61	.41

Note. Breastfeeding initiation figures come from the Ross Laboratories Mothers Survey [24] and were entered with a one-year time lag relative to advertisements. For example, advertising in 1972 was used to predict a change in breastfeeding initiation that was measured in the 1973 annual study. In the table, B refers to the unstandardized regression coefficient. R² for the model was .27 and n = 28 (years). * p < .05.